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Climate Change Could Cut Corn Belt Crop Yields by Up To 40 Percent by Increasing Unfavorable and Extreme Weather by Mid-Century, According to a New Report

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Considering that 13 states in the U.S. are responsible for nearly 30 percent of global corn crop, Verisk, Brookings Institution Scholarship and experts at AXIS Capital collaborated to quantify the impact from climate change on agricultural risk

Boston, April 28, 2021 (GLOBE NEWSWIRE) -- Thirteen states in the United States, known as the Corn Belt, are responsible for 90 percent of the corn grain and produce in the country and almost 30 percent of the global corn crop. Using climates projected by four climate models as inputs, simulated yields across the Corn Belt during the decade 2046–2055 were 20–40% less than yields simulated during the 1991–2000 decade due to impact of climate change on weather, according to a new report. In addition to the reduction in average yield during the 2046-2055 simulation decade, the year-to-year variation in yield increased significantly with climate change, reflecting a reduction in stability of yield and an associated increase in the risk of catastrophic crop losses.

In collaboration with Verisk (Nasdaq:VRSK), a leading global data analytics provider, David Victor, who at the Brookings Institution has done in-depth research on how the physical impacts of climate change may affect US financial markets, and experts from AXIS Capital, explored how climate change may affect agricultural risk in the United States, specifically looking at the impact on corn yield.

“There is justified concern about effects of recent and future climate changes on agriculture both in the United States and across the globe,” said Dr. Peter Sousounis, vice president and director of climate change research, AIR Worldwide. “If, or when, climate change brings with it more frequent and/or more extreme unfavorable weather to areas of significant crop production, such as the midwestern United States, the potential for significant crop losses and economic impacts could be heightened. The purpose of this study is to further explore these possibilities for future, more extreme climate changes involving more frequent and more damaging events reducing productivity of major crops.”

Verisk’s extreme event modeling business unit, AIR Worldwide (AIR), conducted the research to isolate effects of variation in weather and climate on corn yield. To better understand and quantify the potential magnitude of climate change impacts on crops, an AIR process-based Crop Growth and Yield Model was used to simulate effects of observed past and projected future climate changes on corn yield at high resolution throughout the U.S. Corn Belt, defined as the states: Iowa, Illinois, Indiana, Kansas, Kentucky, Michigan, Minnesota, Missouri, North Dakota, Nebraska, Ohio, South Dakota, and Wisconsin. Corn was chosen as the study focus because it is the most valuable crop grown in the United States and because the United States is the world’s largest producer of corn. Many of the lessons learned from this study are pertinent to other major crops grown domestically and abroad. Victor leads the “Markets at Risk” project at Brookings, and in that capacity collaborated extensively with AIR.  

“Given how much the industry relies on corn production, it’s important to understand its vulnerabilities to the effects of climate change. Moreover, learnings from this research can be applied to the agriculture industry as a whole since any disruptions in this sector are likely to affect other global supply chains – from food and beverage to the production of fibers like cotton,” said Bob Quane, Chief Underwriting Officer AXIS Insurance. “As insurers and reinsurers, we have a critical role in understanding and mitigating risks posed by climate change. This research, conducted in collaboration with AIR Worldwide and scholars from Brookings, is vital as we continue to navigate our changing world.”

When the AIR crop model was used to rigorously simulate effects of observed, historical weather during the period 1974–2019 on corn yield, it was found that climate trends during that period favored increased corn yield over much of the Corn Belt. Climate trends simulated over the period 1991 to 2055 by four climate models caused increased weather stresses and reduced corn yield. This implies, that without mitigation of negative effects of climate change, including adaptation by farmers and improvements to crop genetics and other technological factors, corn yield and production may be negatively impacted in the next few decades. As a result, communities economically dependent on crop production may face financial challenges.

“Experimental research, statistical analysis of historical crop yield data, and process-based computer simulations all indicate that human-caused climate change is already affecting crops, in some cases for the better and in other cases for the worse,” said Dr. Jeff Amthor, the study’s lead author, and assistant vice president at AIR Worldwide. “Perhaps of more importance than effects of recent climate trends on crops are the well-established possibilities for future, more extreme climate changes involving more frequent and more damaging events reducing productivity of major crops including corn, rice, wheat, soybean, cotton and the other staples of human food, fiber, and biofuel across many geographies. In any case, we presently face considerable uncertainty about the timing and magnitudes of potentially negative effects of future climate variation and change on crops.”

Download “Quantifying the Impacts of Climate Change on U.S. Corn Yields” here: http://airww.co/climateagreport

About AIR Worldwide
AIR Worldwide (AIR) provides risk modeling solutions that make individuals, businesses, and society more resilient to extreme events. In 1987, AIR Worldwide founded the catastrophe modeling industry and today models the risk from natural catastrophes, supply chain disruptions, terrorism, pandemics, casualty catastrophes, and cyber incidents. Insurance, reinsurance, financial, corporate, and government clients rely on AIR’s advanced science, software, and consulting services for catastrophe risk management, insurance-linked securities, longevity modeling, site-specific engineering analyses, and agricultural risk management. AIR Worldwide, a Verisk (Nasdaq:VRSK) business, is headquartered in Boston, with additional offices in North America, Europe, and Asia. For more information, please visit www.air-worldwide.com. For more information about Verisk, a leading data analytics provider serving customers in insurance, energy and specialized markets, and financial services, please visit www.verisk.com.

About Verisk 
Verisk (Nasdaq:VRSK) provides predictive analytics and decision-support solutions to customers in the insurance, energy and specialized markets, and financial services industries. More than 70 percent of the FORTUNE 100 relies on the company’s advanced technologies to manage risks, make better decisions and improve operating efficiency. The company’s analytic solutions address insurance underwriting and claims, fraud, regulatory compliance, natural resources, catastrophes, economic forecasting, geopolitical risks, as well as environmental, social, and governance (ESG) matters. Celebrating its 50th anniversary, the company continues to make the world better, safer and stronger, and fosters an inclusive and diverse culture where all team members feel they belong. With more than 100 offices in nearly 35 countries, Verisk consistently earns certification by Great Place to Work. For more: Verisk.comLinkedInTwitterFacebook, and YouTube.

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